Author: Uri Blass
Date: 12:59:29 12/17/00
Go up one level in this thread
On December 17, 2000 at 14:29:20, Enrique Irazoqui wrote:
>On December 17, 2000 at 14:08:33, Peter Berger wrote:
>
>>[D]r5k1/1pqn3p/r4b2/p2p4/8/RP6/RP1BBPP1/3Q1K2 b - - 0 1
>>
>>In this position Black seems to be in serious trouble that calls for drastic
>>measures . The difficulty is that the key move ..Qh2 ( with idea of ..Rxe3 after
>>..Re8 Be3 and the chess on h1 ) doesn't reach perpetual . Still it offers by far
>>the best fighting chances as White's rooks are (temporary?) out of game and
>>black gets ample compensation for the exchange . The usual question : how long
>>does your(?) program need to find ..Qh2 and which program can find this at all ?
>>
>>Btw , Fritz6a can . That it even went on to win this game is another surprising
>>part of the story .. :-)
>>
>>[Event "Stufe=Blitz:60'+10". "]
>>[Site "Berlin"]
>>[Date "2000.12.17"]
>>[Round "?"]
>>[White "Bringer 1.8beta, (PIII500)."]
>>[Black "Fritz 6, (PII300)."]
>>[Result "0-1"]
>>[ECO "B70"]
>>[PlyCount "186"]
>>[EventDate "2000.12.17"]
>>
>>{64MB, General.ctg. Pentium II
>>} 1. e4 {0} 1... c5 {1} 2. Nf3 {5} 2... d6 {0}
>>3. d4 {4} 3... cxd4 {0} 4. Nxd4 {4} 4... Nf6 {0} 5. Nc3 {4} 5... g6 {0} 6. Be2
>>{4} 6... Bg7 {0} 7. Nb3 {5} 7... O-O {0} 8. O-O {4} 8... Nc6 {0} 9. Bg5 {4}
>>9... Be6 {0} 10. Kh1 {4} 10... Na5 {0} 11. Nd5 {5} 11... Bxd5 {0.22/12 262} 12.
>>exd5 {6} 12... Nxb3 {0.22/12 102} 13. axb3 {4} 13... Qc7 {0.22/12 186} 14. c4 {
>>105} 14... Ne4 {0.00/13 326} 15. Be3 {5} 15... a5 {0.00/13 196} 16. Qc2 {148}
>>16... Nc5 {0.19/13 0} 17. Rfe1 {109} 17... Rfe8 {0.12/13 238} 18. Kg1 {241}
>>18... Qb6 {0.19/13 258} 19. Ra3 {89} 19... e6 {0.22/12 70} 20. dxe6 {67} 20...
>>fxe6 {0.19/12 95} 21. Rea1 {7} 21... Ra6 {0.28/12 105} 22. h4 {94} 22... Rf8 {
>>0.06/12 98} 23. Bg4 {5} 23... Qc7 {0.03/11 84} 24. Kf1 {128} 24... Rfa8 {
>>-0.06/10 74} 25. h5 {87} 25... gxh5 {0.00/12 0} 26. Bxh5 {98} 26... Bf6 {
>>0.00/11 6} 27. R1a2 {119} 27... Nd7 {0.25/11 76} 28. Qe2 {114} 28... d5 {
>>0.22/10 54} 29. cxd5 {75} 29... exd5 {0.34/12 0} 30. Qd1 {74} 30... Rd6 {
>>0.37/11 52} 31. Bd2 {102} 31... Rda6 {0.41/11 43} 32. Be2 {6} 32... Qh2 {
>>0.00/11 177} 33. Bxa6 {126} 33... Qh1+ {0.75/12 0} 34. Ke2 {4} 34... Re8+ {
>>0.78/10 21} 35. Be3 {54} 35... Rxe3+ {0.75/12 0} 36. Kd2 {201} 36... Qxg2 {
>>0.87/13 0} 37. Qf1 {106} 37... Qxf1 {0.84/12 32} 38. Bxf1 {62} 38... Rf3 {
>>0.84/13 0} 39. Ke2 {66} 39... Rf4 {0.81/13 0} 40. Rxa5 {104} 40... Re4+ {
>>0.84/13 0} 41. Kd1 {86} 41... Rd4+ {1.06/13 168} 42. Ke1 {7} 42... Re4+ {
>>0.78/12 39} 43. Be2 {102} 43... Nb6 {0.84/14 0} 44. Kf1 {68} 44... Rf4 {
>>0.78/13 5} 45. f3 {39} 45... Bd4 {0.69/13 84} 46. Kg2 {4} 46... Rf7 {
>>0.50/13 184} 47. b4 {5} 47... Kg7 {0.50/12 38} 48. b5 {45} 48... Kf6 {
>>0.00/12 37} 49. Kh3 {58} 49... Ke5 {0.06/13 110} 50. b3 {60} 50... Be3 {
>>-0.06/12 41} 51. Kg3 {60} 51... Rg7+ {-0.03/13 0} 52. Kh2 {104} 52... Kf4 {
>>-0.09/13 0} 53. Ra1 {43} 53... d4 {-0.25/11 21} 54. Ra7 {75} 54... Bf2 {
>>-0.28/11 26} 55. R1a2 {41} 55... Bg3+ {-0.38/11 19} 56. Kh1 {44} 56... Ke3 {
>>-0.59/12 16} 57. Bd1 {40} 57... d3 {-0.66/12 19} 58. Rg2 {14} 58... h5 {
>>-0.84/13 14} 59. b4 {43} 59... Nd5 {-0.78/12 17} 60. Rg1 {35} 60... Nf4 {
>>-1.63/12 12} 61. Ra2 {33} 61... Nh3 {-2.13/13 18} 62. Rgg2 {30} 62... h4 {
>>-2.06/13 0} 63. b6 {41} 63... Rg6 {-2.44/12 13} 64. Ba4 {40} 64... Rxb6 {
>>-2.72/13 0} 65. b5 {36} 65... Kxf3 {-2.81/13 0} 66. Rgb2 {35} 66... Ke3 {
>>-2.84/13 0} 67. Rb1 {33} 67... Rg6 {-3.34/13 0} 68. Kg2 {34} 68... Nf4+ {
>>-3.13/13 0} 69. Kh1 {113} 69... Bf2 {-3.50/14 0} 70. b6 {51} 70... Ne2 {
>>-3.50/13 0} 71. Ra3 {43} 71... Ng3+ {-3.97/14 0} 72. Kh2 {32} 72... Ne4 {
>>-3.94/13 0} 73. Rf1 {37} 73... Bg3+ {-4.16/11 10} 74. Kh3 {9} 74... Nf2+ {
>>-4.16/11 13} 75. Rxf2 {6} 75... Bxf2 {-4.28/12 2} 76. Bb5 {22} 76... Rd6 {
>>-4.34/13 0} 77. Rb3 {42} 77... Bg3 {-4.28/14 0} 78. Be8 {22} 78... Kf2 {
>>-4.50/13 15} 79. Bh5 {54} 79... d2 {-4.53/15 0} 80. Rb1 {35} 80... Be5 {
>>-4.59/13 22} 81. Rd1 {29} 81... Bf6 {-5.59/12 11} 82. Bg6 {49} 82... Ke3 {
>>-5.63/12 14} 83. Bh5 {22} 83... Rxb6 {-5.59/12 15} 84. Rf1 {22} 84... Rb5 {
>>-5.69/12 20} 85. Bg4 {87} 85... Rg5 {-6.13/13 30} 86. Bd1 {36} 86... Rg3+ {
>>-6.56/13 12} 87. Kh2 {5} 87... Be5 {-6.59/12 3} 88. Kh1 {44} 88... b5 {
>>-6.72/14 0} 89. Rf8 {32} 89... h3 {-6.84/12 19} 90. Rf1 {23} 90... Kd4 {
>>-7.06/12 12} 91. Rf2 {21} 91... Rd3 {-8.75/12 12} 92. Kg1 {4} 92... b4 {
>>-9.25/11 4} 93. Rf1 {32} 93... Re3 {-15.19/13 0} 0-1
>
>Century 3 sees it immediately and for the good reasons. Gambit Tiger picks Qh2
>too, but doesn't see the perpetual. It misses the 0.00 evaluation. :)
>
>On a P750, 92MB hash:
>
>00:00:00.7 -1,34 8 101683 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Be2 Qxf2
>Rxa5
>00:00:00.4 -1,18 8 115517 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Be2 Qxf2
>Rxa5
>00:00:01.4 -1,22 9 295405 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Be2 Re4 Rxa5
>00:00:10.5 -1,00 10 2339267 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Be2 Re4
>Rxa5 Rd4+ Bd3 Qxf2+ Kc1
>00:00:23.6 -1,26 11 5408825 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Qf1 Rg3
>Qxg2 Rxg2 Bxb7 Nb6 Rxa5 Rxf2+
>00:00:54.0 -1,04 12 12557903 Qh2 Bxa6 Qh1+ Ke2 Re8+ Be3 Rxe3+ Kd2 Qxg2 Qf1 Qh2
>Kxe3 bxa6 Kd2 Qf4+ Kc2
>00:05:20.7 -1,58 13 77254078 Qh2 Bxa6 Qh1+ Ke2 Qxg2 b4 Re8+ Re3 Rxe3+ Bxe3 bxa6
>Rxa5 d4 Bh6 Qg4+ Kd2 Qxd1+
>
>Deep Fritz didn't get it in 15 minutes. Chessmaster should do well in this
>position.
>
>Enrique
I guess that it is possible that Deep fritz does not see it thanks to better
king safety evaluation.
I am not sure if Qh2 is the best move and it is possible that white has king
safety problems after a move like Re6.
After 32...Qh2 33.Bxa6 Qh1+ 34.Ke2 Re8+ 35.Be3 Rxe3+ 36.Kd2 Qxg2 37.Qf1 Qxf1
38.Bxf1 black has no queen so it has no king attack.
I think that white blundered later.
Uri
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